# Pool Math by TroubleFreePool vs Swimming Pool Calculator

The clearest difference is price: Pool Math by TroubleFreePool at Free against Swimming Pool Calculator's $4.99. Pool Math by TroubleFreePool also leads on update cadence (fortnightly vs every 2 months) and review sentiment (63% vs 49%). Swimming Pool Calculator's advantage is rating (3.9 vs 3.7) and chart position (#197 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

Pool Math by TroubleFreePool is free to download; Swimming Pool Calculator costs $4.99 up front. Pool Math by TroubleFreePool sells 1 in-app purchase, starting at $7.99 per year and Swimming Pool Calculator sells 4 in-app purchases, starting at $4.49 per 3 months. Whichever you choose, the download price is not the number that matters.

Swimming Pool Calculator holds the better App Store score, 3.9 against 3.7. That said, the two scores are not equally well evidenced: Pool Math by TroubleFreePool has 272 ratings behind it against 40, so its average is the more settled of the two. Written reviews complicate that: 63% of Pool Math by TroubleFreePool's written reviews are positive against 49% of Swimming Pool Calculator's, so the app with the better star average is not the one people write more warmly about.

Pool Math by TroubleFreePool ships an update fortnightly, Swimming Pool Calculator every 2 months. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Pool Math by TroubleFreePool | Swimming Pool Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.7 (272 ratings)](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359/reviews) | **[3.9 (40 ratings)](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680/reviews)** |
| Number of ratings | **272** | 40 |
| Positive reviews | **63.4% of reviews** | 48.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | — | **#197** |
| Size | 314 MB | 116 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TroubleFreePool](https://appshunter.io/developer/1228819358) | [Fernando Montero](https://appshunter.io/developer/1591745682) |

## What reviewers say

### Pool Math by TroubleFreePool

[App page](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359)

Easily manage your swimming pool's water chemistry by tracking key levels like chlorine and pH. This app calculates the precise amounts of chemicals needed to maintain clear, algae-free water, offering a cost-effective alternative to pool store advice.

**Highlights:** Chemical level calculators (pH, Chlorine, Alkalinity, etc.), Track pool maintenance tasks, Log chemical additions, Weather condition tracking, Chemical addition effect calculations, Bleach price comparison, Data backup and export

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pool Math Premium Subscription | $7.99 | per year |

**What reviewers like**

- 💎 Excellent for maintaining a clean, balanced pool
- 🔍 Comprehensive tracking of test results and chemical additions
- 🧠 Helpful recommendations for chemical adjustments
- ⚙️ Useful features like SLAM mode and timeline
- 🤖 Automatic weather data logging

**What reviewers complain about**

- 🐛 Issues with data syncing and backup
- 🤔 Unintuitive interface and navigation
- 💰 Subscription model and lack of one-time purchase
- 🚫 Limited support for non-chlorine sanitizers and spa-specific options
- 🔄 Bugs with chemical addition logging and target value retention

**Reported bugs**

- Subscription issues and inability to restore purchases
- App crashes and freezes on certain actions
- Incorrect chemical recommendations and calculations
- Disappearing historical data after updates

**Requested features**

- Custom target ranges and alerts
- Ability to log non-standard chemical additions
- Export options for data analysis
- Apple Watch integration
- Improved user guidance and on-boarding


### Swimming Pool Calculator

[App page](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680)

**Currently charting:** #197 Top Paid · Utilities (US App Store)

Easily calculate necessary pool chemicals and troubleshoot common water issues like green or cloudy water. This app provides daily and weekly maintenance routines to keep your pool water crystal clear and ready for swimming.

**Highlights:** Chemical calculation, Water issue troubleshooting, Daily maintenance routines, Weekly maintenance routines, Crystal clear water maintenance

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Premium | $4.49 | per 3 months |
| Suscripción Gold | $6.99 | per 3 months |
| Suscripción Platinum | $7.99 | per month |
| Suscripción Adamantium | $49.99 | per month |


## Frequently asked questions

### Is Pool Math by TroubleFreePool free?

Pool Math by TroubleFreePool is free to download, with in-app purchases available.

### Is Swimming Pool Calculator free?

Swimming Pool Calculator costs $4.99, and also offers in-app purchases.

### Which has better reviews, Pool Math by TroubleFreePool or Swimming Pool Calculator?

Swimming Pool Calculator is rated higher. Pool Math by TroubleFreePool averages 3.7 out of 5 from 272 ratings, while Swimming Pool Calculator averages 3.9 from 40 ratings.

### Do Pool Math by TroubleFreePool or Swimming Pool Calculator have ads?

Neither Pool Math by TroubleFreePool nor Swimming Pool Calculator shows ads.

### Which is updated more often, Pool Math by TroubleFreePool or Swimming Pool Calculator?

Pool Math by TroubleFreePool ships an update fortnightly, and Swimming Pool Calculator every 2 months. Most recently, Pool Math by TroubleFreePool was updated on September 22, 2026 and Swimming Pool Calculator on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*